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Dual direction axial fan

A bidirectional axial, flow-through technology for non-variable displacement pumps, components of pumping devices for elastic fluids, pump elements, etc.

Inactive Publication Date: 2013-03-06
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason for this is that motors are designed to spin in both directions, and generally a single axial fan cannot work in both directions

Method used

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  • Dual direction axial fan
  • Dual direction axial fan
  • Dual direction axial fan

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Embodiment Construction

[0050] According to an aspect of the present invention, there is provided an axial fan operable in a first and a second direction of rotation. For the purposes of the following detailed description, an axial fan is a fan that blows fluid in an axial direction. Typically, axial fans have blades that rotate in one direction with a given orientation so that fluid is blown in only one direction. But in the present invention, the blade orientation is switchable and the axial fan is rotatable in first and second directions to blow air in first and second axial directions. Axial fans can be used in many applications where less efficient radial fans would otherwise be required. To achieve this, axial fans include switching mechanisms that adjust the blades in both directions of rotation. The switching mechanism is a combination of a rack and pinion mechanism and a centrifugal switching mechanism.

[0051] refer to figure 1 , providing a bidirectional axial flow fan 10. The axial ...

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Abstract

A dual direction axial fan (10) is provided and includes a body (20) having a retention assembly (21) and being rotatable in first or second directions, a blade (30) being retained by the retention assembly such that the airfoil section (31) extends from the body (20) with the blade (30) assuming first, second or third orientations and a switching mechanism (40) coupled to the retention assembly (21) to urge the blade (30) to assume the second or the third orientation when the body (20) rotates in the first or the second direction, respectively.

Description

technical field [0001] The subject matter disclosed herein relates to bi-directional axial fans, and more particularly to bi-directional axial fans with switching mechanisms. Background technique [0002] Industrial environments often employ totally enclosed, fan cooled (TEFC) motors. These motors are only slightly more expensive than open type motors, but offer protection from common hazards. They are constructed with a small fan on the rear axle of the motor which is usually covered by a casing. This fan draws air over the motor fins and removes excess heat to cool the motor. The motor is dust tight and also has a modest water seal. [0003] In many rotating machines, radial fans are required, even though axial fans would be ideal. The reason for this is that motors are designed to rotate in both directions, and generally a single axial fan cannot work in both directions. Thus, the use of radial fans represents a compromise in performance. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/32
CPCF04D29/364
Inventor H.K.穆里基普迪R.G.加达斯M.R.赖
Owner GENERAL ELECTRIC CO